#include <stdio.h>
#define MAX(x,y)   ((x)>(y)?(x):(y)) //定义宏，比较x和y的大小


int main ()
{
   int a = 2;
   int b = 6;
   //scanf("%d %d",&a,&b);
   int ret = MAX(a,b);
   printf ("%d",ret);
    return 0;
}